Pump



' 18, 1941- M. R. SHEEN I 2,263,429

' PUMP- Filed July 27, 1939 In I v I 24 w all-m 7 I Email 2 mg 7 ,1 I J7 :jfi

IN VENT OR.

ATTORNEY.

' Patented Nov. 18,1941

UNITED STAT ES PATENT OFFICE PUMP Milton Roy Sheen, Philadelphia, Pa. Application July 27, 1939, Serial 'No. 286,825

2 Claims.

' in parallel to control the inflow to said casing,

and a second pair of similarly independent ball valves operating in parallel to control the outflow from said casing, each of said valves being accessible wholly independently of each of the others of said valves for repair and replacement purposes, access to each valve being had through an aligned aperture normally closed by a removable threaded plug, cap or equivalent device, and said openings being laterally positioned with respect to one another and at different elevations for each pair, and preferably also at different elevations for all of the valves of the said casing.

A further object resides in the fact, that in the improved construction there is an intermediate bore or cylinder into which a power-actuated piston reciprocates, and also two other bores laterally disposed with respect to the axis of said cylinder, unaligned valves connecting said cylinder with each of said last-mentioned bores, and a second valve for each. of such last-mentioned bores connecting said last-mentioned bores respectively with inlet and outlet channels, the axes of said valves being parallel and spaced laterally with respect to one another.

Still another and more specific object resides in' the fact that in the preferred form of the device said lateral bores are not only laterally spaced from the axis of said cylinder, but are arranged so that their axes extend substantially parallel with that of said cylinder, while the several valves communicating with said laterally spaced bores are in a substantially 1-2-3-4 stepped relation with respect to one another.

Still further objects reside in the provision of a device of this character which is notable for its extreme simplicity, and minimum number ofparts liable to wear; a device'in which there is a maximum efliciency of displacement, thereby giving the highest capacity with minimum power expenditure against a given pressure; the provision of a valve assembly which by virtue of its very design and construction insures the automatic and positive discharge of air and small particles of dirt, thereby making the valve as a unit self-cleaning and protecting it against cutting, grooving, wire-drawing and similar wear and resulting leakage from the lodgement other wise of foreign particles, in any one or more of the respective valve seats; the provision of a valve structure which automatically :dischargesand thereby prevents the accumulation of air and resulting'air'binding, and the provision of further details as will hereinafter appear.

With-the objects thus briefly stated, the invention comprises further details of construction, which are hereinafter fully brought outin the following description, when read in conjunction with the accompanying drawing, in which Fig. 1 is a top plan view of a device comprising oneembodiment of the invention, and Fig. ,2 is a vertical section on. the line 22 of Fig. 1. I

Referring to the drawings, a valve casing is shown as comprising a body portionl into which extends, preferably horizontally, a primary cylindrical bore 2, defined outwardly bya relatively restricted aperture 3 which, if desired, may be sealed by means of any suitable type of conventional stufllng boxor the like. Into this cylinder reciprocates a piston 2a. The 'innermost'end-of said primary bore opens into a valvechamber *4, the upper and otherwise-threaded open end lot which is normally closed by means of a correspondingly threaded plug 6 and washer I. Said chamber terminates downwardly in an annular shoulder 8, upon which rests the flangedportion 9 of a tubular valve seat l0,supportingfa ball valve H downwardly biased by gravityor otherwise, the upper movement of .which is limited either by thelower surface of the threaded portion (if-the plug 8 or an extension I! thereof.

From the valve seat I0,which-is removable for repair or replacement through the upper end 5 of'the chamber 4, afterflrst removing therefrom the plug 6, an auxiliary or branch channel ll extends substantially-horizontally, but preferably slightly downwardly so as to drain into a second threaded inlet bore 2|, which is normally connected'by piping or in other suitable manner with .a source of liquid to be pumped under propulsion of the piston in. This pair of ball valves comprises-a dual control for the inlet side of the pump .and thus form a doubly pcsitive'means .for preventing liquid flowing reversely through the channel l3 and outer the inlet 2| for the reason that if either of theballs is held ever so slightly above its adjacent tubular seat, so asto thereby permit nular shoulder 25 which defines the downward limit of a valve chamber 26, the upper threaded portion 21 of which is normally closed by means 01 a similarly threaded plug 28 and a washer 29, all of said plugs like said ball valve and tubular seats being preferably of the same size and construction, so as to thereby permit their being interchangeable.

Extending laterally from said last-mentioned valve chamber 26 in substantial parallelism with the axis of the primary bore 2, preferably upon a slight slant for drainage purposes, is a second branch or secondary bore 30, the opposite end of which opens through a tubular valve seat 3|, supporting a valve 32 and resting upon an annular shoulder 33, which defines the lower extent of a fourth valve chamber 34, which is also provided upwardly with a threaded opening 35, normally closed by means of a similarly threaded plug 36 and a washer 31. From said last mentioned chamber a channel 33 leads to an internally threaded discharge or outlet bore 39, which a dual outlet control and operate in the same manner as said first pair. Thus, as said piston reciprocates within said primary bore or cylinder '2, a positively uni-directional flow of liquid is maintained from the inlet 2| to the outlet 33, while it will be also seen that there has been provided a valve structure which by removing one or more of the plugs 6,16, 28 and 36, access may be readily had to their corresponding balls and valve seats, while the slight slant given to said branch channels l3 and 3!) permit liquid therein to drain towards and through the respective valve chambers l3 and 26, as when the several plugs and valves are removed for the purpose of cleaning the device as a whole.

- In considering the scope of the present invention, it is to be understood that there is anticipated the condition in which two, three, or even more, valve units may be used upon. one functional side of the pump or primary cylinder, while only one such unit is used upon the opposite side. For instance, there are conditions under which two or possibly three (or conceivably even more) such units may have to be used upon the intake side, while only one such unit will suflice upon the discharge side or vice versa. Therefore, all such combinations which include a plurality of the improved independent valve units upon either one or both sides are intended to be covered by the appended claims. Similarly, while a horizontal piston or pump cylinder has been illustrated and described, it is to be understood that vertical and other angularly disposed pistons are included within the invention, both when the stepped valve arrangement is in the relative position herein shown, or with the branch bores substantially horizontal and the primary or pump bore is substantially vertical, or at any other angle with respect thereto.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent of the United States is:

l. A pump and valve assembly for liquids, comprising a casing provided with a substantially horizontal primary pump bore having an upwardly enlarged portion adjacent to its inner end and an opening leading therefrom, a piston adapted to reciprocate. within said bore, a discharge outlet in said casing, a diagonally upwardly extending channel connecting said opening with said outlet, a downwardly biased valve above said opening connecting said pump bore with said channel, a downwardly biased valve connecting said discharge outlet with said channel, an inlet aperture in said primary bore, an intake in said casing, a diagonally upwardly extending channel connecting said intake with said inlet aperture, a downwardly biased valve connecting said intake with said last-mentioned channel, and a downwardly biased valve connecting said inlet aperture with said last-mentioned channel, and

the upper wall portion of the entire path taken 7 by liquids between said intake and said discharge outlet including both of said channels and said pump bore being free from gas-receiving pockets or recesses.

2. A pump and valve assembly for liquids, comprising a casing provided with a substantially horizontal primary pump bore having an upwardly enlarged portion adjacent to its inner end and an opening leading therefrom, a piston adapted to reciprocate within said bore, a discharge outlet in said casing, a diagonally upwardly extending channel connecting said opening with said outlet, a downwardly biased ball valve above said opening connecting said pump bore with said channel, a downwardly biased ball valve connecting said discharge outlet with said channel, an inlet aperture in said primary bore, an intake in said casing, a diagonally upwardly extending channel connecting said intake with said inlet aperture, a downwardly biased ball valve connecting said intake with said lastmentioned channel, a downwardly biased ball valve connecting said inlet aperture with said last-mentioned channel, and the upper wall portion of the entire path taken by liquids between said intake and said discharge outlet including both of said channels and said pump bore being free from gas-receiving pockets or recesses, and removable, upwardly directed valve seats for and in which said valves are free to rotate, said valve seats being flush with said upper wall portion of said path.

MILTON ROY SHEEN. 

